Method for treating bastnasite concentrate

A treatment method, bastnasite technology, applied in the field of metallurgy, can solve the problems of low decomposition rate and long process of carbonate decomposition of rare earths, and achieve the effects of reducing the generation of polluting gases, high leaching rate, and low energy consumption

Inactive Publication Date: 2015-09-30
CHINA ENFI ENGINEERING CORPORATION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbonate decomposition Rare earth decomposition rate is low and the process is long

Method used

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  • Method for treating bastnasite concentrate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Get 500g of bastnaesite concentrate particles processed through ball milling, the average particle diameter of the bastnaesite concentrate particles after the ball milling is 200 orders, and the REO content is 68.29%. Adding 650g of concentration in the concentrate particles is 98% concentrated Sulfuric acid, mixed evenly, matured at 200°C for 5 hours, took the matured mature ore and immersed it in water at room temperature for 2 hours according to the solid-to-liquid ratio of 1:10, filtered and washed to obtain the leached slag after the leaching reaction was completed, dried and tested the slag Residual REO content, ThO 2 content. The measured slag rate is 5.86%, the REO leaching rate is 96.12% based on slag, the thorium content in the slag is 290ppm, and the thorium leaching rate is above 98%.

[0036] The above method has simple process, high REO leaching rate, low energy consumption, less consumption of auxiliary materials, thorium radioactivity content in the sla...

Embodiment 2

[0038] Get 500g of bastnaesite concentrate particles processed through ball milling, the average particle diameter of the bastnaesite concentrate particles after the ball milling is 280 mesh, REO content 58.37%, add 500g massfraction 98% concentrated H in this concentrate 2 SO 4 , mixed evenly, and matured at a temperature of 210°C for 4 hours. Take the matured mature ore and soak it in water at room temperature for 1 hour according to the solid-to-liquid ratio of 1:8. After the leaching reaction is completed, filter and wash to obtain the leached slag. Residual REO content, ThO 2 content. The measured slag rate is 6.13%, the REO leaching rate is 95.47% based on slag, the thorium content in the slag is 207ppm, and the thorium leaching rate is 98.6%.

[0039] The above method has simple process, high REO leaching rate, low energy consumption, less consumption of auxiliary materials, thorium radioactivity content in the slag is within the range required by the discharge standa...

Embodiment 3

[0041] Get 500g of bastnaesite concentrate particles processed through ball milling, the average particle diameter of the bastnaesite concentrate particles after the ball milling is 240 mesh, REO content 67.25%, add 650g mass fraction 98% concentrated H in this concentrate 2 SO 4 , mixed evenly, and matured at a temperature of 180°C for 5 hours. Take the matured mature ore and soak it in water at room temperature for 1 hour according to the solid-to-liquid ratio of 1:10. Residual REO content, ThO 2 content. The measured slag rate is 6.08%, the REO leaching rate is 96.15% based on slag, the thorium content in the slag is 285ppm, and the thorium leaching rate is 98.02%.

[0042] The above method has simple process, high REO leaching rate, low energy consumption, less consumption of auxiliary materials, thorium radioactivity content in the slag is within the range required by the discharge standard, and no fluorine and radioactive thorium wastes are discharged in the whole proc...

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Abstract

The invention discloses a method for treating bastnasite concentrate. The method comprises the following steps: (1) conducting ball-milling treatment on the bastnasite concentrate to obtain bastnasite concentrate particles; (2) mixing the bastnasite concentrate particles with concentrated sulfuric acid to cure the bastnasite concentrate particles so as to obtain cured ore; (3) conducting slurry mixing on the cured ore, and conducting water immersion and filtration so as to obtain leach liquor and leach residue; (4) conducting extraction treatment on the leach liquor to obtain tombarthite and thorium containing extract liquor; (5) conducting reverse extraction treatment on the thorium containing extract liquor to obtain thorium nitrate. According to the method, Sichuan bastnasite concentrate can be effectively treated, the process is simple, the REO leaching rate is high, the energy consumption is low, the auxiliary material consumption is less, the radioactive thorium content is greatly reduced in the standard range, the fluorine and radioactive thorium emission in the whole process can be avoided, the leach residue can be directly discharged after being subjected to water washing, the environment can be protected, the tombarthite can be efficiently separated, the fluorine and thorium resources can be comprehensively utilized, and the method is a clean and new production process for metallurgical treatment of the bastnasite concentrate.

Description

technical field [0001] The invention belongs to the field of metallurgy, in particular, the invention relates to a treatment method of bastnaesite concentrate. Background technique [0002] my country is a country rich in rare earth resources in the world. Commonly used rare earth concentrates mainly include Baotou mixed rare earth concentrate (fluorocarbon ore and monazite), Sichuan rare earth concentrate (bastnaesium), Shandong Weishan rare earth concentrate (fluorocarbon Cerium), ion-adsorbed concentrates (seven southern provinces such as Jiexi, Pingyuan, Xunwu, Longnan, Chongzuo and other goblin concentrates, of which REO (rare earth oxides) accounted for 92%), monazite concentrates in Guangdong and Hunan . For bastnaesite, due to the different mineral forms, the physical and chemical properties of bastnaesite in different regions often have major differences. Sichuan bastnaesite is the second largest rare earth resource in my country, but the physical and chemical forms...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B3/26C22B59/00
CPCY02P10/20
Inventor 覃波王国珍韩连敬邱爽唐建文吕东周文龙
Owner CHINA ENFI ENGINEERING CORPORATION
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